Hemoglobinometer



Oct. 13, 1931.

H. vL. 'WALTER HEMOGLOBINOMETER Filed Aug. l2, 1927 2LH m Patented ct. 13, 1931 UNITED STATES PATENT OFFICE.

HENRY L. WALTER, F TWIN FALLS, IDAHO, ASSIGNOR OF ONE-HALF TO HOWARD S.

I DE WiITT, OF TWIN FALLS, IDAHO HEMOGLOBINOMETER Application led August 12, 1927. S'erial No. 212,600.

The object of my invention is to provide a hemoglobinometer which in what I consider the best embodiment of my invention at the present time will combine the qualities of accuracy in scale reading, facility for storage of a number of pipettes containing blood samples; compactness; and a unit o r 'self-container as to the provision of lighting means.

My invention consists in whatever is described by -or is included within the terms or scope of the appended claims.

In the drawings:

Fig. 1 is a perspective view of an instrument embodying my inventionjarranged for use;

Fig. 2 is atop plan view thereof with the telescope removed;

Fig. 3 is a side elevation or view of the central portion thereof;

Fig. 4 is a transverse section on the line 4--4 of Fig. 3.

Briefly describing the embodiment of the invention illustrated in the drawings, it comprises an oblong, flat-sided casing, a linear blood-standard and scale which are movable longitudinally of the standard below a centrally located opening through which the sample of blood or pipette to be examined 'is visible with a portion of the standard, the scale graduations being movable with reference to a fixed pointer or index also centrally located, a telescope mounted on the top of the casing and having a hinge connection therewith that permits it to be swung from a vertical position in alignment with the inspection hole to a pros'trate position on the top of the casing, and illuminating devices comprising an electric lamp situated below the standard and pipette being examined, and which is supplied with current from a dry battery or cells in the casing, and stora e compartments Jfor pipettes on the top 0% the casing. Of course, the invention may be embodied in instruments which Will not contain all of the features of construction just mentioned.

Describing in in the drawings, 10, is divided by a horizontal partition, 11,

detail the instrument shown the oblong flat-sided casing,-

into upper and lower compartments, the Y upper compartment being shallow, and pronarrow straight plate, 12, upon the upper side of which is mounted a straight glass or transparent bar, 13, colored to form the customary standard for blood comparison and a straight graduated strip or gauge, 14, the standard and the strip thus'being linear, and hence, length of standard and scale provided greater than when such parts aremade circular, and hence finer comparisons and indications are possible. The scale is exposed at midlength of the top of the casing through a sight opening, 15, which at one edge has a pointer or index, 16, and immediately adj acent such sight opening is a round opening, 17, in the casing top through which the portion of the standard below is visible, and such opening is of a size or diameter also to exhibit immediately adjacent the standard a pipette, 18, containing the sample of blood to be examine so that sample, standard, and scale are immediately adjacent and all are in the top, or the same side, of the casing, so that immediately and without any movement the observer may at once by the scale read the value of the indication.

A s usuala telescope or observation glass, 19, 1s provided and it is connected by a pivot or hinge 20, with the top of the casing adj acent they round sight opening, so that the telescope may be swung from a vertical position for use over the sight opening to one lying along or on the top of the casing, and thus the bulk of the instrument when not in use may be reduced and the danger of damage to the telescope is obviated which would be possible from knocks or blows should it extend, as in its reading position, at right angles to the casing. Upon the top of the casing opposite the telescope when in'ts prostrate position, Yis a box-like projection, 21, subdivided by'horizontal and vertical partitions into pigeon-holes, 22, each adapted to hold a pipette, and thus provision isr made for the convenient storage of pipettes. The height of said projection is substantially the diameter of the telescope, so that the parts of the.

viding a guideway for a metal strip or long, y

2 Lenette apparatus are thus more or .less symmetriin the lower compartment including a lamp` cally and compactly arranged. f below the sample support.

For the convenient and close or nice lonln testimony whereof I hereunto aiix my gitudinal movement of the standard and signature. 5 gauge the carrier plate or strip, 12, has on its underside near one edge a rack bar, 23, which is engaged by a ptinion, 24, on a transversely extending sha 25, lwhich, on the HENRY L. WALTER. 70

side of the casing opposite the one havin 1 the openinglfor the insertion and removal o 75 l a pipette, as a milled head or button, 26, for turning. Preferably the opposite edges of the carrler plate, 12, are situated in gulde grooves in the opposite sides of the casing Y above the partition, 11. 8U

Below the standard, 13, the carrier, 12, has a longitudinally extending slot, 27, of a width transversely to be overhung on oneside by the standard and by the pipette being inspected, so that the light from an electric lam l 85 28, situated in the casing belowV the sig t opening will shine at the same time through immediately adjoining portions of the standard and the pipette, and thus standard and blood som 1o immodioooiy adjoining will bo oo 4 illuminate and ma be seen -under the most advantageous con itions :tor observation. Of course, the partition, 11, directly below the round sight opening, 17, has an opening, 29, for the passage of light from the lamp. 95 l The lamp preferably has a reflector 30, and

the current for the lamp is supplied by two cells, 31, contained in the larger, lower compartment o f the casing, each being inserted through the casing end, and held in place, 100

and so as to make proper circuit connections with the lamp, by a removable end wall', 32. A switch, 33, of ordinary construction is provided to open and close the lamp circuit, and

9 the switch and the lam socket and .reflector 105 are carried by a remova le portion 34, of the side wall of the casing below.the pipette in-v sorting opening.

What is claimed is: 1. A hemoglobinometer having a casing 110 and comparison means including a sight opening and a storage space for a lplurallty o pipettes projecting from one of t e casing Y sides and having a telescope movably con- Y nected with the same side of the casing at 115 its bottom and movable from a horizontal position alongside said storage space to a vertical position and being connected with the casing in both positions, the sight openin being situated between said projection an v 120 the point of connection of the telescope with the casing.

2. A hemoglobinometer havinggan elo ated casmg, a longitudinal partitmn divi 'ng l0 its interior into upper and lower compart-` 125 ments, a linear stan ard and linear scale edge to edge and slidable longitudinally in the upper com artment, an observation hole'in the top of t el upper compartment,'sample sup. 55 port below said hole, and illuminating means 

